Revert "Move liblight to vaquish-common"

This reverts commit b4590301821f5f271cdcbd9f591e9c94d869cc06.
Build liblight if TARGET_USES_MOTOROLA_COMMON_LIBLIGHT

Thanks dhacker for the idea/solution

Change-Id: I65cc4f2165bcf10dce99b2d7cd8b54d6647d7d1e